i just write with bug in here, in my script alert is ok. When i change #box to .box - doesnt change anything.
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MichaelDec 13 '13 at 19:20

How many #box elements do you have? If only one, then you don't need the .each() method. If you have more than one #box element, then you should rename them all to class="box" instead of id="box" -- IDs must be unique.
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gibberishDec 13 '13 at 19:22

Please ensure that your code in the above question is EXACTLY what you have in your real code, character-for-character.
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gibberishDec 13 '13 at 19:23